Here is my strat: Check both sides, then bring up the camera, only check Cam 1C (Booty Cave) and Cam 6 (Kitchen) back and forth, rinse and repeat. When Freddy is at Cam 6, close the right door, then follow the strat. Yeah thats going to drain the power, and it'll take some tries; but it was the only thing I knew to do. So hopefully it'll help you conquer 4/20.